Journal Article

PUBDB-2025-00118

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png ULTRASAT: A Wide-field Time-domain UV Space Telescope

Shvartzvald, Y. (Corresponding author) ; Waxman, E. ; Gal-Yam, A. ; Ofek, E. O. ; Ben-Ami, S. ; Berge, D.DESY* ; Kowalski, M.DESY* ; Bühler, R.DESY* ; Worm, S.DESY* ; Rhoads, J. E. ; Arcavi, I. ; Maoz, D. ; Polishook, D. ; Stone, N. ; Trakhtenbrot, B. ; Ackermann, M.DESY* ; Aharonson, O. ; Birnholtz, O. ; Chelouche, D. ; Guetta, D. ; Hallakoun, N. ; Horesh, A. ; Kushnir, D. ; Mazeh, T. ; Nordin, J. ; Ofir, A. ; Ohm, S.DESY* ; Parsons, D. ; Pe’er, A. ; Perets, H. B. ; Perdelwitz, V. ; Poznanski, D. ; Sadeh, I.DESY* ; Sagiv, I. ; Shahaf, S. ; Soumagnac, M. ; Tal-Or, L. ; Santen, J. V. ; Zackay, B. ; Guttman, O. ; Rekhi, P. ; Townsend, A. ; Weinstein, A. ; Wold, I.

2024
Institute of Physics Publ. London

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Please use a persistent id in citations: doi:10.3847/1538-4357/ad2704  doi:10.3204/PUBDB-2025-00118

Report No.: arXiv:2304.14482

Abstract: The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2027. It will carry a telescope with an unprecedentedly large field of view (204 deg$^2$) and near-ultraviolet (NUV; 230–290 nm) sensitivity (22.5 mag, 5σ, at 900 s). ULTRASAT will conduct the first wide-field survey of transient and variable NUV sources and will revolutionize our ability to study the hot transient Universe. It will explore a new parameter space in energy and timescale (months-long light curves with minutes cadence), with an extragalactic volume accessible for the discovery of transient sources that is >300 times larger than that of the Galaxy Evolution Explorer (GALEX) and comparable to that of the Vera Rubin Observatory’s Legacy Survey of Space and Time. ULTRASAT data will be transmitted to the ground in real time, and transient alerts will be distributed to the community in <15 minutes, enabling vigorous ground-based follow up of ULTRASAT sources. ULTRASAT will also provide an all-sky NUV image to >23.5 AB mag, over 10 times deeper than the GALEX map. Two key science goals of ULTRASAT are the study of mergers of binaries involving neutron stars, and supernovae. With a large fraction (>50%) of the sky instantaneously accessible, fast (minutes) slewing capability, and a field of view that covers the error ellipses expected from gravitational-wave (GW) detectors beyond 2026, ULTRASAT will rapidly detect the electromagnetic emission following binary neutron star/neutron star–black hole mergers identified by GW detectors, and will provide continuous NUV light curves of the events. ULTRASAT will provide early (hour) detection and continuous high-cadence (minutes) NUV light curves for hundreds of core-collapse supernovae, including for rarer supernova progenitor types.

Note: 40 pages, 16 figures, 3 tables. Submitted to the AAS journals

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Contributing Institute(s):

1. Gammaastronomie (Z_GA)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)
2. Fireworks - Celestial fireworks: revealing the physics of the time-variable sky (725161) (725161)

Experiment(s):

1. Ultraviolet Transient Astronomy Satellite

Appears in the scientific report 2024

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Shvartzvald, Y. (Corresponding author) ; Waxman, E. ; Gal-Yam, A. ; Ofek, E. O. ; Ben-Ami, S. ; Berge, D.DESY* ; Kowalski, M.DESY* ; Bühler, R.DESY* ; Worm, S.DESY* ; Rhoads, J. E. ; Arcavi, I. ; Maoz, D. ; Polishook, D. ; Stone, N. ; Trakhtenbrot, B. ; Ackermann, M.DESY* ; Aharonson, O. ; Birnholtz, O. ; Chelouche, D. ; Guetta, D. ; Hallakoun, N. ; Horesh, A. ; Kushnir, D. ; Mazeh, T. ; Nordin, J.Extern* ; Ofir, A. ; Ohm, S.DESY* ; Parsons, D.Extern* ; Pe'er, A. ; Perets, H. B. ; Perdelwitz, V. ; Poznanski, D. ; Sadeh, I.DESY* ; Sagiv, I. ; Shahaf, S. ; Soumagnac, M. ; Tal-Or, L. ; Van Santen, J.DESY* ; Zackay, B. ; Guttman, O. ; Rekhi, P. ; Townsend, A.Extern* ; Weinstein, A. ; Wold, I.
ULTRASAT: A wide-field time-domain UV space telescope
[10.3204/PUBDB-2023-08030]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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